Preface: AppNeta, now part of Broadcom, is a SaaS-based network performance monitoring solution that provides IT and network operations teams with end-to-end visibility into application performance and network issues from the end-user perspective.
Why do developers need to customize Tcpreplay?
- Testing Firewalls and IDS/IPS: Tcpreplay allows you to replay captured traffic through network devices like firewalls and intrusion detection/prevention systems.
- Tuning Flow Expiry: You can optimize flow timeout settings to improve the accuracy of flow analysis and tuning for flow-based products.
Background: Tcpreplay is a suite of free, open-source command-line tools for replaying and editing network traffic captured in pcap files, which are created by tools like tcpdump and Wireshark. It’s used to test network devices such as intrusion detection systems (IDS), routers, and firewalls by replaying real-world traffic at specific speeds, or to simulate traffic for debugging and performance analysis.
AppNeta, on the other hand, is a commercial network performance monitoring solution. While AppNeta provides a comprehensive suite of features for network monitoring, including bandwidth monitoring, application management, and capacity management, its relationship with Tcpreplay is notable.
Vulnerability details: A vulnerability has been found in appneta tcpreplay up to 4.5.1. The impacted element is the function get_l2len_protocol of the file get.c of the component tcprewrite. Such manipulation leads to use after free. The attack must be carried out locally. The exploit has been disclosed to the public and may be used.
Remedy: Upgrading to version 4.5.2-beta3 is sufficient to resolve this issue. You should upgrade the affected component.
Official announcement: Please see the link for details –